TM10-3930-660-20 18-5. PISTON PUMP -  TEST/REPLACE (Cont‘d) g. Tag, disconnect, and plug the load compensator line (5) at the load compensator (6) . h. Connect a test hose from the tee fitting on the inlet port of the flowmeter to the load compensator (6)  . 3. CHECK THAT THE TEST CONNECTIONS MATCH THOSE SHOWN ON THE TEST SCHEMATIC IN THIS PARAGRAPH. 4. CHECK FOR PROPER FLOW. a. Start and run the engine at full throttle, TM10-3930-660-10. b. Adjust the flowmeter to 2500 psi. To ensure accurate flow readings, the flowmeter should be installed as close as possible in the hydraulic circuit to the pump (2), and with as few connections as possible. c. The flow should be within 20 to 26 gpm. If the flow is less than 20 gpm, replace hydraulic pump (2). Refer to removal and installation sections of this paragraph for pump replacement instructions. d. Stop engine, TM10-3930-660-10. 5. REMOVE FLOWMETER. After testing is completed, remove the hydraulic flowmeter, test hoses, and test tee. Connect hydraulic hoses (1) and (3) to pump (2) as tagged. CAUTION Piston pump must be purged of air before engine is started. Refer to para. 18-3 for purging instructions. Failure to purge air as directed may result in severe damage to piston pump. 6. PURGE AIR FROM THE PISTON PUMP. PARA.  18-3. 7. INSTALL TRANSMISSION COVER, PARA.  16-6. 18-16